# Preview App vs OSCope

The clearest difference is update cadence: OSCope at every 5 days against Preview App's every 13 months. OSCope also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Preview App costs $1.99 and OSCope $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Preview App ships an update every 13 months, OSCope every 5 days. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Preview App | OSCope |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 days** |
| Size | 8 MB | 18 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cangmu Technology Co., Ltd](https://appshunter.io/developer/1736424342) | [Evenrain Inc.](https://appshunter.io/developer/6777705942) |

## What reviewers say

### Preview App

[App page](https://appshunter.io/ios/app/preview-app-store-simulator/id1626025800)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OSCope

[App page](https://appshunter.io/ios/app/oscope-on-site-osc-debugger/id6777705940)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Preview App free?

Preview App costs $1.99, with no in-app purchases.

### Is OSCope free?

OSCope costs $1.99, with no in-app purchases.

### Do Preview App or OSCope have ads?

Neither Preview App nor OSCope shows ads.

### Which is updated more often, Preview App or OSCope?

Preview App ships an update every 13 months, and OSCope every 5 days. Most recently, Preview App was updated on September 21, 2026 and OSCope on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*